Flexible container



FIG. 1 is a top perspective view of a flexible container showing my new design;

FIG. 2 is a front side view.

FIG. 3 is a back side view.

FIG. 4 is a right side view.

FIG. 5 is a left side view and:

FIG. 6 is a bottom plan view; and,

FIG. 7 is a top plan view. 

I claim the ornamental design for a flexible container, as shown and described. 